Syntax
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clear dhcp server binding
<address>
<all>
<interface interface-name>
<interfaces-vlan>
<interfaces-wildcard>
<logical-system logical-system-name>
<routing-instance routing-instance-name>
<dual-stack>
Release Information
Command introduced in Junos OS Release
9.0.
Options interfaces-vlan and interfaces-wildcard added in Junos OS Release 12.1.
Command updated with dual-stack statement in Junos
OS Release 17.3.
Description
Clear the binding state of a Dynamic Host Configuration
Protocol (DHCP) client from the client table on the extended DHCP
local server.
Note
If you delete the DHCP server configuration, DHCP server
bindings might still remain. To ensure that DHCP bindings are removed,
issue the clear dhcp server binding command before you
delete the DHCP server configuration.
Options
address—(Optional) Clear the binding state for the DHCP client, using
one of the following entries:
- ip-address—The specified IP address.
- mac-address—The specified MAC address.
- session-id—The specified session ID.
all—(Optional) Clear
the binding state for all DHCP clients.
interface interface-name—(Optional) Clear the binding state for
DHCP clients on the specified interface.
Note
This option clears all bindings whose initial login requests
were received over the specified interface. Dynamic demux login requests
are not received over the dynamic demux interface, but rather the
underlying interface of the dynamic demux interface. To clear a specific
dynamic demux interface, use the ip-address or mac-address options.
interfaces-vlan—(Optional) Clear the binding state on the interface
VLAN ID and S-VLAN ID.
interfaces-wildcard—(Optional) Clear bindings on a set of interfaces.
This option supports the use of the wildcard character (*).
logical-system logical-system-name—(Optional) Clear the binding state for
DHCP clients on the specified logical system.
routing-instance routing-instance-name—(Optional) Clear the binding state for
DHCP clients on the specified routing instance.
dual-stack—(Optional)
Remove either both arms or single arm of dual-stack.
Note
- The dual-stack command is added in the syntax removes both arms of the dual-stack with a single command entry.
- When the dual-stack command is not added in the syntax, the clear dhcpv6 server binding command clears only the family specific arm of the dual-stack.
Required Privilege Level
view
Related Documentation
List of Sample Output
clear dhcp server binding <ip-address>clear dhcp server binding all
clear dhcp server binding interface
clear dhcp server binding <interfaces-vlan>
clear dhcp server binding <interfaces-wildcard>
clear dhcp server binding dual-stack all
Output Fields
See show dhcp server binding for an explanation of output fields.
Sample Output
clear dhcp server binding <ip-address>
The following sample output displays the address bindings in
the DHCP client table on the extended DHCP local server before and
after the clear dhcp server binding command is issued.
user@host> show dhcp server binding
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2 clients, (0 bound, 0 selecting, 0 renewing, 0 rebinding) IP address Hardware address Type Lease expires at 198.51.100.1 00:00:5e:00:53:01 active 2007-01-17 11:38:47 PST 198.51.100.3 00:00:5e:00:53:02 active 2007-01-17 11:38:41 PST
user@host> clear dhcp server binding 198.51.100.1
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user@host> show dhcp server binding
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1 clients, (0 bound, 0 selecting, 0 renewing, 0 rebinding) IP address Hardware address Type Lease expires at 198.51.100.3 00:00:5e:00:53:02 active 2007-01-17 11:38:41 PST
clear dhcp server binding all
The following command clears all DHCP local server bindings:
user@host> clear dhcp server binding all
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clear dhcp server binding interface
The following command clears DHCP local server bindings on a
specific interface:
user@host> clear dhcp server binding interface
fe-0/0/2
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clear dhcp server binding <interfaces-vlan>
The following command uses the interfaces-vlan option to clear all DHCP local server bindings on top of the underlying
interface ae0, which clears DHCP bindings on all demux
VLANs on top of ae0:
user@host> clear dhcp server binding ae0
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clear dhcp server binding <interfaces-wildcard>
The following command uses the interfaces-wildcard option to clear all DHCP local server bindings over a specific interface:
user@host> clear dhcp server binding ge-1/0/0.*
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clear dhcp server binding dual-stack all
The following command clears all the dual-stack local server
bindings.
user@host> clear dhcp server binding dual-stack
all